Answer :
The colored petals of Petunia and Geranium can be used to identify acids and bases through a process known as pH indicator testing.
These flowers contain pigments that exhibit different colors under varying pH conditions. The petals act as natural pH indicators, changing color in response to changes in the acidity or alkalinity of the surrounding environment.
For instance, when placed in an acidic solution, the petals may change color to indicate the presence of an acid. In contrast, when immersed in a basic solution, the color change might indicate the presence of a base.
The extent of color change and the specific hues observed can provide valuable information about the pH of the tested solution.
In conclusion, the colored petals of Petunia and Geranium serve as natural pH indicators due to their ability to exhibit different colors under different pH conditions. This simple and visual method can be used as an educational tool or in some cases for qualitative assessment of the pH of various solutions.
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